Credit: AP

A man smokes marijuana during the annual marijuana 420 smoke off at Dundas Square in Toronto on Friday, April 20, 2012. All around the world pro-marijuana supporters are gathering in support of cannabis.

Prospective pot shop owners be warned: New England’s top narcotics cop says federal agents won’t hesitate to come down on dispensaries that pop up next year under the Bay State’s medical marijuana law.

John J. Arvanitis, special agent in charge of the Drug Enforcement Administration’s New England Division, told the Herald in an exclusive interview that the feds will probe pot pharmacies as they see fit.

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